CN113248840A - Automobile door handle and electroplating process thereof - Google Patents
Automobile door handle and electroplating process thereof Download PDFInfo
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- CN113248840A CN113248840A CN202110506657.5A CN202110506657A CN113248840A CN 113248840 A CN113248840 A CN 113248840A CN 202110506657 A CN202110506657 A CN 202110506657A CN 113248840 A CN113248840 A CN 113248840A
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K13/00—Use of mixtures of ingredients not covered by one single of the preceding main groups, each of these compounds being essential
- C08K13/06—Pretreated ingredients and ingredients covered by the main groups C08K3/00 - C08K7/00
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K3/02—Elements
- C08K3/04—Carbon
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K5/00—Use of organic ingredients
- C08K5/04—Oxygen-containing compounds
- C08K5/10—Esters; Ether-esters
- C08K5/12—Esters; Ether-esters of cyclic polycarboxylic acids
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K9/00—Use of pretreated ingredients
- C08K9/02—Ingredients treated with inorganic substances
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D3/00—Electroplating: Baths therefor
- C25D3/02—Electroplating: Baths therefor from solutions
- C25D3/12—Electroplating: Baths therefor from solutions of nickel or cobalt
- C25D3/14—Electroplating: Baths therefor from solutions of nickel or cobalt from baths containing acetylenic or heterocyclic compounds
- C25D3/18—Heterocyclic compounds
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/10—Electroplating with more than one layer of the same or of different metals
- C25D5/12—Electroplating with more than one layer of the same or of different metals at least one layer being of nickel or chromium
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25D—PROCESSES FOR THE ELECTROLYTIC OR ELECTROPHORETIC PRODUCTION OF COATINGS; ELECTROFORMING; APPARATUS THEREFOR
- C25D5/00—Electroplating characterised by the process; Pretreatment or after-treatment of workpieces
- C25D5/54—Electroplating of non-metallic surfaces
- C25D5/56—Electroplating of non-metallic surfaces of plastics
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- E—FIXED CONSTRUCTIONS
- E05—LOCKS; KEYS; WINDOW OR DOOR FITTINGS; SAFES
- E05B—LOCKS; ACCESSORIES THEREFOR; HANDCUFFS
- E05B85/00—Details of vehicle locks not provided for in groups E05B77/00 - E05B83/00
- E05B85/10—Handles
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2227—Oxides; Hydroxides of metals of aluminium
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2265—Oxides; Hydroxides of metals of iron
- C08K2003/2275—Ferroso-ferric oxide (Fe3O4)
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/38—Boron-containing compounds
- C08K2003/387—Borates
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/01—Magnetic additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
Abstract
The invention discloses an automobile door handle and an electroplating process thereof, which relate to the technical field of automobile accessory manufacturing, and the technical scheme of the automobile door handle comprises the following components in parts by weight: 32-36 parts of polystyrene; 8-12 parts of DOP; 3-6 parts of calcium carbonate; 3-6 parts of nano aluminum oxide; 1.6-1.8 parts of a composite stabilizer; 1.2-2.5 parts of carbon black; 1-1.2 parts of zinc borate; 0.6-0.8 part of modified magnet powder; wherein, the preparation of the modified magnet powder comprises the following steps: step 1, putting blocky magnets into a grinder to be ground, and screening by a drying net to select particles with the particle size of less than 8 mm; step 2, putting the magnet material with the particle size smaller than 8mm into a reaction kettle, stirring, introducing copper sulfate with the concentration of 72-84g/L, uniformly stirring, baking, and cooling to room temperature; and 3, introducing the particles obtained in the step 2 into a grinding machine for grinding to obtain modified magnet powder with the particle size of less than 6 microns. The invention has the effects of obtaining the automobile door handle which has high hardness and strength and is convenient and fast to electroplate.
Description
Technical Field
The invention relates to the technical field of automobile accessory manufacturing, in particular to an automobile door handle and an electroplating process thereof.
Background
The traditional automobile door handle is a hardware product, namely a handle made of metal such as iron, steel, aluminum and the like through physical processing such as forging, rolling, cutting and the like, but the handle made of the material has high cost and is heavy. Currently, most door handle products on the market use plastic materials instead of metals, by using plastic materials with decorative properties such as: PC, PMMA, ABS, PA and the like substitute metal materials. However, the existing plastic door handle has poor mechanical strength and fatigue resistance, low surface hardness and limited wear resistance, belongs to a part which is high in automobile use frequency and easy to scratch, and is easy to scratch and damage after being used for a long time or wear in other normal use processes.
Chinese patent publication No. CN106589788A discloses a plastic handle material for an automobile door, which is made of the following materials in parts by weight: comprises 25-30 parts of polystyrene, 45-55 parts of phenolic resin, 8-10 parts of polymethacrylate, 7-11 parts of polyphenylene sulfide, 12-16 parts of tetraphenyltin, 22-25 parts of abietic acid, 8-10 parts of nano alumina, 14-18 parts of polyamide, 11-18 parts of polyvinyl formal fiber, 4-9 parts of di-n-octyl phthalate and 6-8 parts of diisodecyl phthalate, 7-11 parts of alkylphenol polyoxyethylene, 3-7 parts of talcum powder, 16-20 parts of barium sulfate, 5-7 parts of mica powder, 22-25 parts of carbon black, 4-9 parts of zinc borate, 3-9 parts of calcium silicate hydrate, 12-17 parts of nano molybdenum disulfide, 3-5 parts of zirconium oxide, 14-16 parts of triethylene tetramine and 21-26 parts of boron nitride.
However, the surface of the plastic handle is not electroplated, so that a trace which directly damages the structure of the plastic handle is generated in collision, the use effect of the plastic handle is seriously affected, and the improvement is needed.
Disclosure of Invention
In view of the defects in the prior art, a first object of the present invention is to provide an automobile door handle, which has the effects of high hardness, high strength and convenient and fast electroplating.
In order to achieve the purpose, the invention provides the following technical scheme:
an automobile door handle comprises the following components in parts by weight:
32-36 parts of polystyrene; 8-12 parts of DOP; 3-6 parts of calcium carbonate; 3-6 parts of nano aluminum oxide; 1.6-1.8 parts of a composite stabilizer; 1.2-2.5 parts of carbon black; 1-1.2 parts of zinc borate; 0.6-0.8 part of modified magnet powder;
wherein, the preparation of the modified magnet powder comprises the following steps:
step 1, putting blocky magnets into a grinder to be ground, and screening by a drying net to select particles with the particle size of less than 8 mm;
step 2, putting the magnet material with the particle size smaller than 8mm into a reaction kettle, stirring, introducing copper sulfate with the concentration of 72-84g/L, uniformly stirring, baking, and cooling to room temperature;
and 3, introducing the particles obtained in the step 2 into a grinding machine for grinding to obtain modified magnet powder with the particle size of less than 6 microns.
The invention is further configured to: the preparation method of the automobile door handle comprises the following steps:
s1, adding 32-36 parts by weight of polystyrene, 8-12 parts by weight of DOP, 3-6 parts by weight of calcium carbonate, 3-6 parts by weight of nano alumina, 1.6-1.8 parts by weight of composite stabilizer, 1.2-2.5 parts by weight of carbon black, 1-1.2 parts by weight of zinc borate and 0.6-0.8 part by weight of modified magnet powder into a mixer, mixing for 20min, and controlling the temperature of the mixer to be 80 ℃ to obtain a mixed material;
s2, placing the mixed material into an injection molding machine, and cooling to obtain a vehicle door handle blank;
and s3, performing surface treatment on the vehicle door handle blank, electroplating a protective layer and obtaining a finished vehicle door handle.
The invention is further configured to: the composite stabilizer is a calcium zinc stabilizer.
The invention is further configured to: the thickness of the protective layer of the automobile door handle is 22-32 mu m.
The invention is further configured to: the protective layer comprises an inner layer and an outer layer, the thickness of the inner layer is 6-8 μm, and the thickness of the outer layer is 14-24 μm.
The second purpose of the invention is to provide an electroplating process of an automobile door handle, which comprises the following steps:
s1, surface treatment: taking the blank of the vehicle door handle, putting the blank into deoiling liquid for cleaning, taking out the blank, cleaning by clear water and drying in the air;
s2, inner layer coating: placing the dried vehicle door handle blank into acid liquor with pH of 5-6, standing for 30-60min, controlling the temperature of the acid liquor to be 45-55 ℃, taking out, placing into inner layer electroplating solution, electroplating for 8min, controlling the temperature of the electroplating solution to be 45-55 ℃, taking out and drying after the inner layer electroplating is finished;
s3, outer layer coating: and (3) placing the dried vehicle door handle blank into outer layer electroplating liquid for electroplating for 20min, controlling the temperature of the electroplating liquid to be 45-55 ℃, taking out and drying after the outer layer electroplating is finished, and obtaining a finished vehicle door handle.
The invention is further configured to: the inner plating solution comprises 26-38g/L of nickel chloride, 23-27g/L of sodium hypophosphite, 6-8g/L of polyvinylpyrrolidone and 5-7g/L of sodium citrate.
The invention is further configured to: the outer layer electroplating solution comprises 28-36g/L of nickel chloride, 16-20g/L of chromic oxide, 6-8g/L of fluosilicic acid and 5-7g/L of sodium citrate.
The invention is further configured to: in S2, the acid solution is chromium trioxide, and the concentration is 180-220 g/L.
The invention is further configured to: in S2, the acid solution is sulfuric acid solution, and the concentration is 220-260 g/L.
In conclusion, the invention has the following beneficial effects: through the combination of polystyrene, DOP, calcium carbonate and nano-alumina, the intermolecular spacing is reduced under the action of the modified magnetic powder with magnetism, and the structural stability and strength of the automobile door handle are improved; meanwhile, the inner-layer coating and the outer-layer coating are formed on the outer side of the automobile door handle, the injection molding part and the outer-layer coating in the automobile door handle are bonded by the inner-layer coating, and a stable coating structure is formed under the combination of the outer-layer coating, and the automobile door handle is smooth and uniform in color and luster, so that the automobile door handle with high hardness, high strength and convenient and fast electroplating effect is obtained.
Detailed Description
In order to make the technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Example one
An automobile door handle comprises, by weight, 32 parts of polystyrene, 8 parts of DOP, 3 parts of calcium carbonate, 3 parts of nano-alumina, 1.6 parts of calcium zinc stabilizer, 1.2 parts of carbon black, 1 part of zinc borate and 0.6 part of modified magnet powder.
The preparation method of the modified magnet powder comprises the following steps:
step 1, putting blocky magnets into a grinder to be ground, and screening by a drying net to select particles with the particle size of less than 8 mm;
step 2, putting the magnet material with the particle size smaller than 8mm into a reaction kettle, stirring, introducing copper sulfate with the concentration of 72g/L, uniformly stirring, and cooling to room temperature after baking;
and 3, introducing the particles obtained in the step 2 into a grinding machine for grinding to obtain modified magnet powder with the particle size of less than 6 microns.
Correspondingly, the preparation method of the automobile door handle comprises the following steps:
s1, adding 32 parts by weight of polystyrene, 8 parts by weight of DOP, 3 parts by weight of calcium carbonate, 3 parts by weight of nano-alumina, 1.6 parts by weight of calcium-zinc stabilizer, 1.2 parts by weight of carbon black, 1 part by weight of zinc borate and 0.6 part by weight of modified magnet powder into a mixer, mixing for 20min, and controlling the temperature of the mixer to be 80 ℃ to obtain a mixed material;
s2, placing the mixed material into an injection molding machine, and cooling to obtain a vehicle door handle blank;
and s3, performing surface treatment on the vehicle door handle blank, electroplating a protective layer and obtaining a finished vehicle door handle.
It should be mentioned that the protective layer of the door handle of a motor vehicle has a thickness of 22 to 32 μm. Wherein the protective layer comprises an inner layer and an outer layer. The thickness of the inner layer is 6-8 μm, and the thickness of the outer layer is 14-24 μm. In this example, the thickness of the protective layer of the automobile door handle was measured to be 26.2 μm. The thickness of the inner layer was 6.3 μm and the thickness of the outer layer was 19.9 μm.
Meanwhile, the application discloses electroplating process of an automobile door handle, which comprises the following steps:
s1, surface treatment: taking the blank of the vehicle door handle, putting the blank into deoiling liquid for cleaning, taking out the blank, cleaning by clear water and drying in the air;
s2, inner layer coating: placing the dried vehicle door handle blank into acid liquor with pH of 5, standing for 30min, controlling the temperature of the acid liquor to be 45 ℃, taking out the acid liquor, placing the acid liquor into inner-layer electroplating liquid, electroplating for 8min, controlling the temperature of the electroplating liquid to be 45 ℃, taking out the electroplating liquid after the inner-layer electroplating is finished, and drying the electroplating liquid, wherein the acid liquor is chromium trioxide with the concentration of 180g/L, and the inner-layer electroplating liquid comprises nickel chloride with the concentration of 26g/L, sodium hypophosphite with the concentration of 23g/L, polyvinylpyrrolidone with the concentration of 6g/L and sodium citrate with the concentration of 5 g/L;
s3, outer layer coating: and (3) placing the dried vehicle door handle blank into outer layer electroplating liquid for electroplating for 20min, controlling the temperature of the electroplating liquid to be 45 ℃, taking out and drying after the outer layer electroplating is finished, and obtaining the finished vehicle door handle, wherein the outer layer electroplating liquid comprises 28g/L of nickel chloride, 16g/L of chromium oxide, 6g/L of fluosilicic acid and 5g/L of sodium citrate.
Example two
An automobile door handle comprises, by weight, 34 parts of polystyrene, 10 parts of DOP, 4.5 parts of calcium carbonate, 4.5 parts of nano-alumina, 1.7 parts of calcium zinc stabilizer, 1.8 parts of carbon black, 1.1 parts of zinc borate and 0.7 part of modified magnet powder.
The preparation method of the modified magnet powder comprises the following steps:
step 1, putting blocky magnets into a grinder to be ground, and screening by a drying net to select particles with the particle size of less than 8 mm;
step 2, putting the magnet material with the particle size smaller than 8mm into a reaction kettle, stirring, introducing 77g/L copper sulfate, uniformly stirring, and cooling to room temperature after baking;
and 3, introducing the particles obtained in the step 2 into a grinding machine for grinding to obtain modified magnet powder with the particle size of less than 6 microns.
Correspondingly, the preparation method of the automobile door handle comprises the following steps:
s1, adding 34 parts by weight of polystyrene, 10 parts by weight of DOP, 4.5 parts by weight of calcium carbonate, 4.5 parts by weight of nano alumina, 1.7 parts by weight of calcium zinc stabilizer, 1.8 parts by weight of carbon black, 1.1 parts by weight of zinc borate and 0.7 part by weight of modified magnet powder into a mixer, mixing for 20min, and controlling the temperature of the mixer to be 80 ℃ to obtain a mixed material;
s2, placing the mixed material into an injection molding machine, and cooling to obtain a vehicle door handle blank;
and s3, performing surface treatment on the vehicle door handle blank, electroplating a protective layer and obtaining a finished vehicle door handle.
It should be mentioned that the protective layer of the door handle of a motor vehicle has a thickness of 22 to 32 μm. Wherein the protective layer comprises an inner layer and an outer layer. The thickness of the inner layer is 6-8 μm, and the thickness of the outer layer is 14-24 μm. In this example, the thickness of the protective layer of the automobile door handle was measured to be 29.6 μm. The thickness of the inner layer was 7.1 μm and the thickness of the outer layer was 22.5. mu.m.
Meanwhile, the application discloses electroplating process of an automobile door handle, which comprises the following steps:
s1, surface treatment: taking the blank of the vehicle door handle, putting the blank into deoiling liquid for cleaning, taking out the blank, cleaning by clear water and drying in the air;
s2, inner layer coating: placing the dried vehicle door handle blank into acid liquor with the pH value of 5.5, standing for 45min, controlling the temperature of the acid liquor to be 50 ℃, taking out the acid liquor, placing the acid liquor into inner-layer electroplating solution for electroplating for 8min, controlling the temperature of the electroplating solution to be 50 ℃, taking out the electroplating solution after the inner-layer electroplating is finished, and drying, wherein the acid liquor is chromium trioxide with the concentration of 200g/L, and the inner-layer electroplating solution comprises nickel chloride with the concentration of 32g/L, sodium hypophosphite with the concentration of 25g/L, polyvinylpyrrolidone with the concentration of 7g/L and sodium citrate with the concentration of 6 g/L;
s3, outer layer coating: and (3) placing the dried vehicle door handle blank into an outer layer electroplating solution for electroplating for 20min, controlling the temperature of the electroplating solution to be 50 ℃, taking out and drying after the outer layer electroplating is finished, and obtaining the finished vehicle door handle, wherein the outer layer electroplating solution comprises 32g/L of nickel chloride, 18g/L of chromium oxide, 7g/L of fluosilicic acid and 6g/L of sodium citrate.
EXAMPLE III
An automobile door handle comprises, by weight, 36 parts of polystyrene, 12 parts of DOP, 6 parts of calcium carbonate, 6 parts of nano-alumina, 1.8 parts of calcium zinc stabilizer, 2.5 parts of carbon black, 1.2 parts of zinc borate and 0.8 part of modified magnet powder.
The preparation method of the modified magnet powder comprises the following steps:
step 1, putting blocky magnets into a grinder to be ground, and screening by a drying net to select particles with the particle size of less than 8 mm;
step 2, putting the magnet material with the particle size smaller than 8mm into a reaction kettle, stirring, introducing 84g/L copper sulfate, uniformly stirring, and cooling to room temperature after baking;
and 3, introducing the particles obtained in the step 2 into a grinding machine for grinding to obtain modified magnet powder with the particle size of less than 6 microns.
Correspondingly, the preparation method of the automobile door handle comprises the following steps:
s1, adding 36 parts by weight of polystyrene, 12 parts by weight of DOP, 6 parts by weight of calcium carbonate, 6 parts by weight of nano-alumina, 1.8 parts by weight of calcium-zinc stabilizer, 2.5 parts by weight of carbon black, 1.2 parts by weight of zinc borate and 0.8 part by weight of modified magnet powder into a mixer, mixing for 20min, and controlling the temperature of the mixer to be 80 ℃ to obtain a mixed material;
s2, placing the mixed material into an injection molding machine, and cooling to obtain a vehicle door handle blank;
and s3, performing surface treatment on the vehicle door handle blank, electroplating a protective layer and obtaining a finished vehicle door handle.
It should be mentioned that the protective layer of the door handle of a motor vehicle has a thickness of 22 to 32 μm. Wherein the protective layer comprises an inner layer and an outer layer. The thickness of the inner layer is 6-8 μm, and the thickness of the outer layer is 14-24 μm. In this example, the thickness of the protective layer of the automobile door handle was measured to be 31.6 μm. The thickness of the inner layer was 7.8 μm and the thickness of the outer layer was 23.8 μm.
Meanwhile, the application discloses electroplating process of an automobile door handle, which comprises the following steps:
s1, surface treatment: taking the blank of the vehicle door handle, putting the blank into deoiling liquid for cleaning, taking out the blank, cleaning by clear water and drying in the air;
s2, inner layer coating: placing the dried vehicle door handle blank into acid liquor with the pH value of 6, standing for 60min, controlling the temperature of the acid liquor to be 55 ℃, taking out the acid liquor, placing the acid liquor into inner-layer electroplating solution, electroplating for 8min, controlling the temperature of the electroplating solution to be 55 ℃, taking out the acid liquor after the inner-layer electroplating is finished, and drying, wherein the acid liquor is chromium trioxide with the concentration of 220g/L, and the inner-layer electroplating solution comprises nickel chloride with the concentration of 38g/L, sodium hypophosphite with the concentration of 27g/L, polyvinylpyrrolidone with the concentration of 8g/L and sodium citrate with the concentration of 7 g/L;
s3, outer layer coating: and (3) placing the dried vehicle door handle blank into an outer layer electroplating solution for electroplating for 20min, controlling the temperature of the electroplating solution to be 55 ℃, taking out and drying after the outer layer electroplating is finished, and obtaining the finished vehicle door handle, wherein the outer layer electroplating solution comprises 36g/L of nickel chloride, 20g/L of chromium oxide, 8g/L of fluosilicic acid and 7g/L of sodium citrate.
Example four
The difference between the fourth embodiment and the first embodiment is that the acid solution in the fourth embodiment is a sulfuric acid solution, and the concentration is 220 g/L.
EXAMPLE five
The difference between the fifth embodiment and the first embodiment is that the acid solution in the fifth embodiment is a sulfuric acid solution, and the concentration is 240 g/L.
EXAMPLE six
The sixth embodiment is different from the first embodiment in that the acid solution in the sixth embodiment is a sulfuric acid solution, and the concentration is 260 g/L.
Comparative example 1
Comparative example one differs from example one in that no modified magnet powder was added to comparative example one.
Comparative example No. two
Comparative example two differs from example one in that the acid solution in comparative example two is hydrochloric acid and the PH is 5-6.
Comparative example No. three
Comparative example three differs from example one in that the protective layer in comparative example three has only an inner layer, and the thickness of the inner layer is 8 to 20 mm.
The performance tests were performed on examples one to four and comparative examples one to three, and the test results were as follows:
meter-performance testing meter
The adopted high temperature resistance test is that the product is baked for 24 hours in an oven at 200 ℃, and the appearance is graded according to appearance change after being taken out of the oven, wherein the grade is I-V five, V represents no change, and I represents obvious change and peeling.
In conclusion, the polystyrene, DOP, calcium carbonate and nano-alumina are combined, and the intermolecular spacing is reduced under the action of the magnetic modified magnet powder, so that the structural stability and strength of the automobile door handle are improved; meanwhile, the inner-layer coating and the outer-layer coating are formed on the outer side of the automobile door handle, the injection molding part and the outer-layer coating in the automobile door handle are bonded by the inner-layer coating, and a stable coating structure is formed under the combination of the outer-layer coating, and the automobile door handle is smooth and uniform in color and luster, so that the automobile door handle with high hardness, high strength and convenient and fast electroplating effect is obtained.
References in this application to "first," "second," "third," "fourth," etc., if any, are intended to distinguish between similar elements and not necessarily to describe a particular order or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances such that the embodiments described herein may be practiced in sequences other than those described. Furthermore, the terms "comprises" and "comprising," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, or apparatus.
It should be noted that the descriptions in this application referring to "first", "second", etc. are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
The principle and the implementation of the present application are explained herein by applying specific examples, and the above description of the embodiments is only used to help understand the method and the core idea of the present application; meanwhile, for a person skilled in the art, according to the idea of the present application, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present application.
Claims (10)
1. The automobile door handle is characterized by comprising the following components in parts by weight:
32-36 parts of polystyrene; 8-12 parts of DOP; 3-6 parts of calcium carbonate; 3-6 parts of nano aluminum oxide; 1.6-1.8 parts of a composite stabilizer; 1.2-2.5 parts of carbon black; 1-1.2 parts of zinc borate; 0.6-0.8 part of modified magnet powder;
wherein, the preparation of the modified magnet powder comprises the following steps:
step 1, putting blocky magnets into a grinder to be ground, and screening by a drying net to select particles with the particle size of less than 8 mm;
step 2, putting the magnet material with the particle size smaller than 8mm into a reaction kettle, stirring, introducing copper sulfate with the concentration of 72-84g/L, uniformly stirring, baking, and cooling to room temperature;
and 3, introducing the particles obtained in the step 2 into a grinding machine for grinding to obtain modified magnet powder with the particle size of less than 6 microns.
2. An automotive door handle as set forth in claim 1, characterized in that the method of making the automotive door handle comprises the steps of:
s1, adding 32-36 parts by weight of polystyrene, 8-12 parts by weight of DOP, 3-6 parts by weight of calcium carbonate, 3-6 parts by weight of nano alumina, 1.6-1.8 parts by weight of composite stabilizer, 1.2-2.5 parts by weight of carbon black, 1-1.2 parts by weight of zinc borate and 0.6-0.8 part by weight of modified magnet powder into a mixer, mixing for 20min, and controlling the temperature of the mixer to be 80 ℃ to obtain a mixed material;
s2, placing the mixed material into an injection molding machine, and cooling to obtain a vehicle door handle blank;
and s3, performing surface treatment on the vehicle door handle blank, electroplating a protective layer and obtaining a finished vehicle door handle.
3. An automotive door handle as set forth in claim 2, wherein: the composite stabilizer is a calcium zinc stabilizer.
4. An automotive door handle as set forth in claim 2, wherein: the thickness of the protective layer of the automobile door handle is 22-32 mu m.
5. An automobile door handle according to claim 4, wherein: the protective layer comprises an inner layer and an outer layer, the thickness of the inner layer is 6-8 μm, and the thickness of the outer layer is 14-24 μm.
6. An electroplating process of an automobile door handle is characterized by comprising the following steps:
s1, surface treatment: taking the blank of the vehicle door handle, putting the blank into deoiling liquid for cleaning, taking out the blank, cleaning by clear water and drying in the air;
s2, inner layer coating: placing the dried vehicle door handle blank into acid liquor with pH of 5-6, standing for 30-60min, controlling the temperature of the acid liquor to be 45-55 ℃, taking out, placing into inner layer electroplating solution, electroplating for 8min, controlling the temperature of the electroplating solution to be 45-55 ℃, taking out and drying after the inner layer electroplating is finished;
s3, outer layer coating: and (3) placing the dried vehicle door handle blank into outer layer electroplating liquid for electroplating for 20min, controlling the temperature of the electroplating liquid to be 45-55 ℃, taking out and drying after the outer layer electroplating is finished, and obtaining a finished vehicle door handle.
7. An electroplating process for an automobile door handle according to claim 6, wherein the electroplating process comprises the following steps: the inner plating solution comprises 26-38g/L of nickel chloride, 23-27g/L of sodium hypophosphite, 6-8g/L of polyvinylpyrrolidone and 5-7g/L of sodium citrate.
8. An electroplating process for an automobile door handle according to claim 6, wherein the electroplating process comprises the following steps: the outer layer electroplating solution comprises 28-36g/L of nickel chloride, 16-20g/L of chromic oxide, 6-8g/L of fluosilicic acid and 5-7g/L of sodium citrate.
9. An electroplating process for an automobile door handle according to claim 6, wherein the electroplating process comprises the following steps: in S2, the acid solution is chromium trioxide, and the concentration is 180-220 g/L.
10. An electroplating process for an automobile door handle according to claim 6, wherein the electroplating process comprises the following steps: in S2, the acid solution is sulfuric acid solution, and the concentration is 220-260 g/L.
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